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4/11/2015 4:17:57 PM EDT
I'm working on my upper receiver and was getting ready to put the upper receiver in the vise block.  However, it won't fit, as there are a couple of protrusions on either side of the receiver that won't allow the vise block to close.  There is a triangular protrusion in front of the forward assist portal and a more shallow rectangular one on the opposite side towards the front of the upper receiver.  Has anyone run into this problem?  I purchased the vise block from Amazon.  I also know I could probably make one out of wood, but I'd prefer to have one the fits properly.   Thanks for any assist.  

Never mind, I figured it out.
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